Function

Description

Syntax
    
size()

Returns the size of the string in bytes.

string_name.size()


    length()

Returns the length/ number of characters in the string, including spaces. (same as size()).

string_name.length()

    push_back()

Appends a character to the end of the string.

string_name.push_back('char')

    pop_back()

Removes the last character of the string.

string_name.pop_back()

    resize()

Resizes the string to the specified number of characters. If the new size is larger, it adds default characters ('\0').

string_name.resize(new_size)

    swap()

Swaps the contents of two strings.

string_name1.swap(string_name2)

    find()

Searches for/ finds the first occurrence of a substring and returns its index. If not found, it returns std::string::npos.

string_name.find("substring")

    erase()

Removes/ erases a part of the string, starting from the given position.

string_name.erase(pos, len)

    compare()

Compares two strings lexicographically.

string_name.compare("another_string")

    substr()

Extracts a substring from the string. It returns a substring starting from a given position and of a specified length.

string_name.substr(pos, len)

    at()

Accesses the character at a specified position.

string_name.at(pos)

    copy()

Copies characters from a string into a char array.

string_name.copy(char_array, len, pos)

    capacity()

Returns the total capacity of the string, i.e., how many characters it can hold without reallocating memory.

string_name.capacity()

    replace()

Replaces part of the string with another string.

str.replace(pos, len, "new_str")

    empty()

Checks if the string is empty.

str.empty()

    append()

Adds another string to the end of the current string.

str.append("another_str")

    shrink_to_fit()

Reduces the capacity of the string to fit its size, releasing unused memory.

str.shrink_to_fit()

data()

Returns a pointer to the underlying character array.

    str.data()

c_str()

Returns a C-style string (null-terminated character array) equivalent to the string object.

str.c_str()

    begin()

Returns an iterator to the first character of the string. Useful for iteration through the string.

string_name.begin()

end()

Returns an iterator to the end of the string. (Marks the end of iteration.)

string_name.end()

    rbegin()

Returns a reverse iterator to the end of the string. Starts reverse iteration from the last character.

string_name.rbegin()

    rend()

Returns a reverse iterator to the beginning of the string.

string_name.rend()